Disclosed is a radio base station (eNB1) provided with a storage unit (130) for storing base station information for selecting the destination of a message, a network communication unit (140) for transmitting the message to another radio base station selected according to the base station information, and a control unit (120) for controlling the storage unit (130) to set as base station information the priority level of the radio base station to which the message was sent according to the state of response to the transmitted message.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A radio base station, comprising: a storage configured to store a base station list indicating a plurality of neighbor radio base stations, each of the plurality of neighbor radio base stations being connected to the radio base station through an X2 interface; a transmitter configured to transmit a plurality of request messages to each of the plurality of neighbor radio base stations through the X2 interface, each of the plurality of request messages including a request for requesting transmission of load information or requesting a change in a handover parameter; a receiver configured to receive a plurality of responses from each of the plurality of neighbor radio base stations through the X2 interface, each of the plurality of responses including either a positive response indicating that a respective request is accepted or a negative response indicating that the respective request is rejected; and a controller configured to: autonomously adjust base station parameters according to the received responses, the base station parameters defining a coverage of the radio base station, set a priority to each of the plurality of neighbor radio base stations according to a plurality of the received responses, wherein the controller decreases the priority of a neighbor radio base station in response to receiving the negative response from the neighbor radio base station, and the controller decreases the priority of a neighbor radio base station in response to not receiving any of the responses from the neighbor radio base station; and select, on the basis of the respective priority of each of the plurality of neighbor radio base station, a first neighbor radio base station as a transmission destination of one of the plurality of request messages, wherein the transmitter is further configured to transmit the one of the plurality of request messages to the first neighbor radio base station through the X2 interface.
A radio base station (like a cell tower) manages its network connections by maintaining a list of neighboring base stations connected via an X2 interface. It sends requests to these neighbors for load information or handover parameter changes. The base station then receives responses, either accepting (positive) or rejecting (negative) the requests. Based on these responses, the base station automatically adjusts its own coverage parameters. Furthermore, it prioritizes neighbor base stations; negative responses or a lack of response lowers a neighbor's priority. The base station then chooses the destination for future request messages based on these priorities, sending the message through the X2 interface to the highest priority neighbor.
2. The radio base station according to claim 1 , wherein the controller is further configured to set a higher priority for a neighbor radio base station which more frequently transmits the positive response.
Building upon the radio base station prioritizing its neighbors, a neighbor base station that frequently sends positive responses receives an even *higher* priority. This means the base station is more likely to send future requests for load or handover information to neighbors that have been cooperative in the past. This ensures that the base station preferentially communicates with reliable and responsive neighbors on the X2 interface. The priority system allows for an efficient usage of network resources.
3. The radio base station according to claim 1 , wherein the controller is further configured to set a lower priority for a neighbor radio base station which more frequently transmits the negative response.
Expanding on the radio base station's neighbor prioritization, a neighbor base station that often sends negative responses to requests receives an even *lower* priority. This makes the base station less likely to send future requests for load or handover information to those neighbors. This avoids wasting resources on neighbors that are unlikely to accept requests. Prioritizing neighbors in this way helps in efficient network communication by sending messages to the more helpful base stations.
4. A control method for a radio base station used in a radio communication system, comprising the steps of: storing a base station list indicating a plurality of neighbor radio base stations, each of the plurality of neighbor radio base stations being connected to the radio base station through an X2 interface; transmitting a plurality of request messages to each of the plurality of neighbor radio base stations through the X2 interface, each of the plurality of request messages including a request for requesting transmission of load information or requesting a change in a handover parameter; receiving a plurality of responses from each of the plurality of neighbor radio base stations through the X2 interface, each received response including either a positive response indicating that a respective request is accepted or a negative response indicating that the respective request is rejected, autonomously adjusting base station parameters according to the received responses, the base station parameters defining a coverage of the radio base station; setting a priority to each of the plurality of neighbor radio base stations according to the plurality of received responses, wherein the controller decreases the priority of a neighbor radio base station in response to receiving the negative response from the neighbor radio base station, and the controller decreases the priority of a neighbor radio base station in response to not receiving any of the responses from the neighbor radio base station; selecting, on the basis of the respective priority of each of the plurality of neighbor radio base station, a first neighbor radio base station as a transmission destination of one of the plurality of request messages; and transmitting the one of the plurality of request messages to the first neighbor radio base station through the X2 interface.
A method for controlling a radio base station in a radio communication system involves these steps: First, a list of neighboring base stations connected via X2 is stored. Then, request messages are transmitted to each neighbor requesting load information or handover parameter changes. Responses are received; these are either positive (request accepted) or negative (request rejected). The base station then adjusts its own coverage parameters based on these responses. Furthermore, a priority is assigned to each neighbor; negative or missing responses decrease a neighbor's priority. Finally, future request messages are sent to the highest priority neighbor, chosen based on the established priority ranking, via the X2 interface.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
May 27, 2011
April 25, 2017
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